Question

given the tables provided, which of the following drop table series of statements would correctly remove the tables without causing an error? a.) drop table track; drop table playlist track; drop table artist; b.) drop table invoice line; drop table invoice; drop table customer; c.) drop table invoice; drop table invoice line; drop table customer; d.) drop table customer; drop table invoice; drop table invoice line;

Answer 1

The correct series of statements to drop the tables without causing an error is option c) - drop table invoice; drop table invoice line; drop table customer;

Step-by-step explanation:

In order to correctly remove the given tables without causing an error, we need to drop them in the correct order, taking into account any foreign key constraints. Looking at the provided tables, it appears that the invoice_line table has a foreign key referencing the track table, and the playlist_track table has a foreign key referencing the track table. Therefore, we need to drop the track table before dropping the other two tables.

From the options provided, option c) is the correct series of statements to drop the tables without causing an error. It first drops the invoice table, which does not have any foreign keys referencing it. Then it drops the invoice_line table, which has a foreign key referencing the invoice table. Finally, it drops the customer table, which does not have any foreign keys referencing it. This order ensures that all foreign key constraints are satisfied.